Why not trust? It's still a good site now in 2015. If you hate ads and pop ups, use adblock or adguard extension. No viruses or scams i can say. It's legal and legit to watch movies and tv on viewster. I don't get it that viewster got a bad rating but it's an awesome site.

Excellent selection of free to watch movies and tv series, especially impressed with the wide variety of Anime!

I will note however there is some content not appropriate for children and parents should be vigilant, otherwise I'm overall impressed with the site except for the adverts that are required to be seen in order to watch the video's, they could do with an ad-free subscription service similar to Crunchyroll maybe! 🙂

Viewster allows users to stream shows via their website for free, legally (Viewster pays for the rights to the shows). Viewster also provides apps for Android and iOS, and most smart TVs come with a Viewster app preinstalled.

The service is funded by ads, so the video you are watching will occasionally pause while an ad is shown (similar to YouTube, except that there is no "Skip Ad" button).

I have not seen any pop-ups while visiting this site (keep in mind that I have Firefox's automatic pop-up blocker enabled).

Some of the shows on Viewster are inappropriate for children.

@HealthyTheWombat
While Quttera had blacklisted viewster.com at the time of your comment, this has since changed (and the link you provided points to the outdated analysis). See the most up-to-date analysis on VirusTotal here:
https://www.virustotal.com/en/url/d3c490a6a499f9bb2e94b0658289395ba4824f79984a14b7f072c9f369d7a064/analysis/
At the time of my comment, this analysis shows viewster.com as totally clean. Perhaps viewster.com had been hacked around the time of your comment?